Rotor assembly static balance test device

Abstract

The utility model relates to the technical field of static balance test devices, in particular to a static balance test device for a rotor assembly, which comprises a support, two bearing packs are mounted on the support, each bearing pack comprises two bearings arranged side by side, the support comprises a base and two supports arranged side by side, one bearing pack is mounted on each support, and the two bearings are mounted on the base. The support is connected to the base in a sliding mode, and the base is further connected with a plurality of bolts used for fixing the support. A sliding groove with an upward opening is formed in the base in the length direction of the base, a sliding block in sliding connection with the sliding groove is arranged at the bottom of the support, and the bolts are evenly arranged in the length direction of the base. According to the utility model, the two supports which can move mutually and can be locked are arranged, so that rotor assemblies with different lengths can be measured, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of static balance test devices, in particular to a static balance test device for a rotor assembly. Background Art

[0002] The rotor assemblies of various rotating equipment in thermal power plants often operate at high speeds. If the rotor assembly itself is unbalanced, centrifugal force will be generated, which will cause equipment vibration during high-speed rotation and even friction in severe cases. During maintenance, a static balance test needs to be carried out on the rotor assembly to ensure that the auxiliary machine can be in a balanced state during rotation.

[0003] Application No. 201620226786.3 discloses a static balance test tooling for a brake wheel, which includes a bracket, two brackets, a guide shaft that is fitted and installed with the brake wheel, four bearings, and four baffles. Each bracket is precisely machined with two shaft platforms on its side. The bearings are sleeved on the shaft platforms and are pressed on the brackets by bolts and baffles. This tooling can carry out static balance tests. However, the disadvantage of this tooling is that it can only test rotating devices with a specific length, and its applicable range is relatively narrow. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a static balance test device for a rotor assembly to solve the problem of the relatively narrow applicable range of the static balance test tooling in the above-mentioned prior art.

[0005] To achieve the above purpose, the utility model provides a static balance test device for a rotor assembly, which includes a support. Two bearing groups are installed on the support. Each bearing group includes two bearings arranged side by side. The support includes a base and two brackets arranged side by side. One bearing group is installed on each bracket. The brackets are slidably connected to the base, and a plurality of bolts for fixing the brackets are also connected to the base.

[0006] Further, a chute with an upward opening is provided on the base along its length direction. A slider that is slidably connected to the chute is provided at the bottom of the bracket. The plurality of bolts are evenly arranged along the length direction of the base.

[0007] Further, a square frame is provided at the top of the bracket. Legs are fixedly connected to the lower part of the square frame. Both ends of two support shafts are fixedly connected to the top of the square frame, and bearings are installed on the support shafts.

[0008] Further, it also includes a magnetic base and a dial indicator. The magnetic base is installed on the top of the bracket, and the dial indicator is installed on the magnetic base.

[0009] By setting two mutually movable and lockable brackets, the utility model can measure rotor assemblies with different lengths, and has a wider applicable range.

[0010] The bearing of the present utility model is installed on the support shaft, and both ends of the support shaft are fixedly connected to the square frame, so as to provide stable and reliable support for the bearing.

[0011] By setting a magnetic base and a dial indicator, the present utility model can measure the shaft bending of the rotating shaft on the rotor assembly. Brief Description of the Drawings

[0012] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0013] Figure 1 It is the front view structural schematic diagram of the embodiment;

[0014] Figure 2 It is the partial cross-sectional view of the left view of the embodiment;

[0015] Figure 3 It is the top view structural schematic diagram of the embodiment;

[0016] Figure 4 It is the schematic diagram of the magnetic base and the dial indicator of the embodiment;

[0017] Figure 5 It is the schematic diagram of the rotor assembly in the embodiment;

[0018] In the figure: 1, bearing; 2, base; 3, bracket; 301, slider; 302, square frame; 303, leg; 4, bolt; 5, support shaft; 6, magnetic base; 7, dial indicator; 8, rotating shaft; 9, impeller. Detailed Description of the Embodiments

[0019] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] As Figures 1 to 3 shown, according to an embodiment of the present utility model, there is provided a static balance test device for a rotor assembly, including a support. Two bearing groups are installed on the support. Each bearing group includes two bearings 1 arranged side by side front and back. The support includes a base 2 and two brackets 3 arranged side by side left and right. One bearing group is installed on each bracket 3. The bracket 3 is slidably connected to the base 2, and a plurality of bolts 4 for fixing the bracket 3 are further connected to the base 2; by setting two movable and lockable brackets 3, the rotor assemblies of different lengths can be measured, and the applicable range is wider.

[0021] The base 2 is provided with an upwardly open slide groove along its length direction, i.e., the left and right direction. The bottom of the bracket 3 is provided with a slider 301 slidably connected to the slide groove. Multiple bolts 4 are respectively arranged on the front and rear sides of the base 2, and the multiple bolts 4 are evenly arranged along the length direction of the base 2.

[0022] A square frame 302 is provided at the top of the bracket 3, and a support leg 303 is fixedly connected to the lower part of the square frame 302, and a slider 301 is connected to the bottom of the support leg 303; the top of the square frame 302 is fixedly connected to the two ends of two support shafts 5, and bearings 1 are installed on the support shafts 5; both ends of the support shafts 5 have fulcrums, which can provide stable and reliable support for the bearings 1.

[0023] like Figure 4 As shown, in one specific embodiment, it also includes a magnetic meter base 6 and a dial indicator 7. The magnetic meter base 6 is installed on the top of the bracket 3, and the dial indicator 7 is installed on the magnetic meter base 6.

[0024] The working principle of the above embodiment is:

[0025] like Figure 5 As shown, the rotor assembly includes a rotating shaft 8 and an impeller 9 mounted on the rotating shaft 8; when performing a static balancing test on the rotor assembly, first adjust the positions of the two brackets 3 according to the length of the rotor assembly to be tested, then hoist the rotor assembly to be tested and place it horizontally on the bracket 3, with both ends of the rotating shaft 8 abutting against the bearing 1; then rotate the rotor assembly, and when the rotor assembly stops rotating, the center of gravity is at the lowest point, and a mark is made at the lowest point; then rotate the rotor assembly 90 degrees to see whether the rotor assembly rotates, if the rotor assembly does not rotate, it proves that it is not overweight and the quality is qualified; if the rotor assembly rotates, add clay at the highest point after the rotor assembly stops, and rotate the rotor assembly 90 degrees again. If the rotor assembly no longer rotates, it is within the range of process requirements; if the rotor assembly still rotates, it exceeds the range of process requirements and the quality is unqualified, and re-add counterweight clay, and repeat the process until the process requirements are met; then evenly fix the counterweights of equal weight on the rotor assembly or re-test after removing the weight on the opposite side.

[0026] When measuring the bending of the rotating shaft 8, place the two journals of the rotating shaft 8 on the bearing 1, fix the dial indicator 7 through the magnetic base 6, make the measuring head of the dial indicator 7 perpendicular to and in contact with the major diameter of the journal, rotate the rotating shaft 8, and record the value of the dial indicator 7. This can achieve the purpose of accurately measuring the bending of the rotating shaft 7. The bending of shafts with different diameters can be measured, and the operation is simple.

[0027] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A static balance test device for a rotor assembly, comprising a support, on which two bearing groups are mounted, each bearing group comprising two bearings (1) arranged in parallel, characterized in that: The support comprises a base (2) and two brackets (3) arranged side by side, each bracket (3) being mounted with a bearing group, the bracket (3) being slidably connected to the base (2), and the base (2) being further connected with a plurality of bolts (4) for fixing the brackets (3).

2. The rotor assembly static balance test device according to claim 1, characterized in that: The base (2) is provided with an upwardly open sliding groove along its length direction, the bottom of the bracket (3) is provided with a sliding block (301) slidably connected to the sliding groove, and a plurality of bolts (4) are evenly arranged along the length direction of the base (2).

3. The rotor assembly static balance test device according to claim 1, characterized in that: A square frame (302) is provided on the top of the bracket (3), and a support leg (303) is fixedly connected to the bottom of the square frame (302); the top of the square frame (302) is fixedly connected to the two ends of two support shafts (5), and bearings (1) are installed on the support shafts (5).

4. The rotor assembly static balance test device according to claim 1, characterized in that: It also comprises a magnetic meter base (6) and a dial indicator (7), wherein the magnetic meter base (6) is mounted on the top of the bracket (3), and the dial indicator (7) is mounted on the magnetic meter base (6).

Images